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A205520 as a simple table

na(n)
181
2360
3360
41683
52412
61683
77572
817166
917166
107572
1135577
12122232
13205803
14122232
1535577
16160218
17864948
182343348
192343348
20864948
21160218
22750426
236127554
2427630789
2544160240
2627630789
276127554
28750426
293387924
3043434216
31312856410

[81,360,360,1683,2412,1683,7572,17166,17166,7572,
 35577,122232,205803,122232,35577,160218,864948,
 2343348,2343348,864948,160218,750426,6127554,
 27630789,44160240,27630789,6127554,750426,3387924,
 43434216,312856410]